【摘要】 红脂大小蠹又名强大小蠹 (DendroctonusvalensLeConte) ,为国内新纪录种 ,是油松 (PinustabulaeformisCarr.)的毁灭性害虫 ,可导致几十年生的油松在较短期内死亡。越冬虫态以成虫和老熟幼虫为主 ,占 77 5 % ,2～ 3龄幼虫为辅 ,占 2 1 7% ,少数以蛹越冬 ,占 0 8%。其生活史以成虫越冬的 1a 1代 ,以老熟幼虫越冬的需跨年度才能完成 1个世代发育 ,以小幼虫越冬的需 3a完成 2代或 2a完成 1代。在种群密度较低时 ,危害生长衰弱的过火木、新伐倒木及新的伐桩 ,种群密度大时 ,能迅速入侵胸径≥ 10cm、树龄在 2 0a生以上的健康木。在郁闭度较低的油松林分中 ,红脂大小蠹的危害明显高于郁闭度高的林分更多还原

【Abstract】 Dendroctonus valens\% LeConte is a new recorded species in China. It is devastating and highly dangerous to the stands of Pinus tabulaeformis , and it can cause the ten year old trees to die in a short time. The pest overwinters mainly as adult or mature larvae (77 5%), others as 2 to 3 instar larvae (21 7%), and a few as pupa (0 8%). When the population density is low, the pest mainly harms the weak firedtrees, newfelled trees, and the new stumps. When the population density is high, the pest can quickly attack the healthy trees with breast height diameter over 10cm and over 20 years old. The damaging situation in low canopy density forests is higher than that in the high canopy density forests.更多还原